Fuel-economizer.



No. 784,106. PATENTED MAR. '7, 1905. W. E. COLE..

FUEL EUONOMIZER.

APPLIUATION FILED APR. Z7, 1904.

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"lilFllC SPECIFICATION forming part of Letters Patent No. "784,106, dated March *7, 1905.

Application filed April 27, 1901i. Serial No. 205,256.

ATo 1J/Z whom it nfl/tty concern:

Be it known that I, WILLIAM E. COLE, a citi- Zen of the United States, residing at Norfolk, in the county of Norfolk and State of Virginia, have invented certain new and useful Innprovements in Fuel-Econornizers, of which the following' is a specification.

The invention relates to an apparatus for superheating oxygen to aid combustion in `boiler-furnaces and furnaces, my object being to produce an oxygen-heater that is economical in iirst cost and durable.

' In the annexed drawings, Figure l is a longitudinal perspective view showing' the usual boiler-setting' and illustrating' the arrangement of the oxygen-heater in the rear of the bridge-wall. Fig. 2 is a section of the bridgewall on line a' a' of Fig. 1. Fig. 3 is a face view of the device apart from the bridgewall, showing' the preferable way the project ing pins should be placed on the plate stag'- gered.

The apparatus consists of the bridge-wall 6, which is generally made of lire-bricks, and therefore non-metallic. It has an air-inlet l0, leading from the ash-pit 4: through its lower portion, and a recess in the rear, into which are placed one or more removable iron plates 7, closing said recess. Said plate 7 has its lower end on a level low'er than the air-inlet and is provided with pins 8, integral therewith and preferably staggered relatively to each other and projecting into the recess of the bridge-wall. The plate '7 is provided with openings l()b near its upper edge to allow the air to escape. The bridge-wall extending at 6 over the recess covers. it and protects the top of the plate from the direct action of the liame. The intense heat in the combustioncharnber is reflected against the plate, which is practically the rear part of the bridge-wall, the pins absorb heat from the plate, the oxygen is drawn through the heater by natural draft into the combustion-chamber and mixes with the fuel-gases, and combustion is greatly increased.

I am aware that many bridge-wall devices exist claiming to aid combustion by preheating the oxygen. Those of brick are worthless, because they cannot heat the oxygen to a degree that would be of any benefit, and those of metal are exposed to the llame and do not last long enough to pay the actual expense ol. installation. .lt is seen that this apparatus is protected from direct flame, yet at the same time it gets all the heat that the metal can stand and be of a life long enough to be of value. 1t is also seen that this plate can stand. much more heat on account of its having nu merous projecting pins on its opposite face. The oxygen continually cooling the pins, the pins are likewise cooling' the plate by calling en the plate for the heat the oxygen getting. l. lind it convenient'to cast the plate, with pins projecting therefrom, with box sides, the sides in measurement being' 'equal the length of the pins and in section-say sixteen inches wide-and use two or three sections, according to the width of the furnace. 'lhe apparatus can then be taken in at the furnacedoor for installation.

l do not conline myself to any particular shaped projection. The object sought is to retard the oxygen in its passage through the heater that it may become more intensely heated by coming in contact with and working its vay upward among the projections.

H aving described my invention,what ,l claim as new is l. ln a luel-economizcr for boiler-furnaces, the combination of a non-metallic ln'idge-wall having an air-inlet througli its lower portion and a recess in the rear, a removable closure-- plate for said recess with its lower end on a level lower than the air-inlet, said plate having' pins integral therewith projecting into said recess and provided with openings near its upper edge to allow the air to escape, suhstantially as described.

2. ln a fuel-economizer for boiler-furlnices, the combination of a non-metallic bridge-wall having' an air-inlet at the base, a recess in the In testimony whereof I ali-ix my signature in presence of two witnesses.

VILLIAM E. COLE.

H. F. BELL, A. M. J oHNsoN.

l t ritnessesz l 

